Stack-kiln.



N0. 874,631. I 1 PATE'NTED DEG. 24,1907.

' H. s. 'SPAOKMAN &E. w. LAZELL.

STAGK KILN.

APPLICATION FILED JULY 27. 1907.

county of Philadel hi-a, and State of r the United States, have Q upon a suitable masonry base UNITED s ArEs PATENT oiuuon A HENRY S. SP-AOKMAN, OF ARDMORE, AND ELLIS W.- LAZELL, OF PHILADELPHIA, PENN- SYLVANIA, ASSIGNORS To PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

STACK-KILN.

Specification of Letters Patent.

Patented Dec. 24, 1907.

Application filgd July 27.1907. Serial No- 385.859.

To all whom it may concern:

Be it known that we, HENRY S. SPAGKMAN a resident of Ardmore, in the county of Montgomery and State of Pennsylvania, and ELLrsW. LAz'nLLfresiding at Philadel hia,

ennsylvania, citizens 0 made certain new and useful Inventions Relating to Stack-Kilns, of which the foL' lowing is a specification, taken connection with the accgmpanying drawingaforminga part of the same.

This invention relates es efficient long flame is produced, the heat of largely. recovered the burned material being in heating the air supplied.

In the accom ianying drawingsshowing an illustrative em odiment of this invention and in which. the samereference numeral refers to similar parts in the several figuresl "Figure 1 is a partial vertical section, and Fig. 2 is a transverse section takensubstantially along the line ofFi .-.1. I

The kiln shaft -21 may-have a. ini-ngS of bricks of suitable character within the shaft body 9 which a metallic shell, as is usual. The upper part 19 of the shell supports the charging door 31 which may be open so as to engage the su port '32 when su plying materials to t e throat 20. As the liiln is preferably operated under suitable suction have its lower end su ported in a substantially central location by any desired means so as to conduct the gases-into the suction pipe 18 which may be connected with a high stack or other exhaustmeans.

Asindicated the shaft may be supported having outer lateral concrete or brick walls inner walls indicated so th dt' sLutabIe ash chutes 2 are provided as Well as an internal air chamber 4. The cooler 7 is preferably in c with the kiln shaft and may be rovided at its lower end with a metallic ischarge cone 6 having external corrugations if desired. The discharge of burned material from the opening 28 is controlled bythe gate eciallyto stack kilns for the burning of me, cement or maybe, of course, inclosedin the goose neck 17 may:

L and also the,

or ribs,

combustion of the fuel therein tion' with further su adjacent the kiln shaft, several se arsite THE HENRY'S. SPAGKMAN ENGINEERING COMPANY, OF

be arrangzd".

naces being preferably employe so asto give more accurate control of the heat.

As indicated in Fig. 1, each furnace preferably comprises access ma be had by the firing door'i i, the bridge wal 12 being provided with a suitable opening 13,

gives the proper clearance and prevents the material in the shaft from entering the furnace throat. 1 Below the grate a suitable ash-pit is. provided to which access may be had by the ash-pit door 15 and a removable ash cover 16 closes anop'ening into the ash chute 2so that ashes may readily pass down this chute and be removed from time to time through the opening 3.

Suitable fines and provided so that the or other 0 comes highly heated by the heat derivedfrom' the burned material in the cooler and from the adjacent walls of the chamber. 'lhi-sair is still'furtl er heated as it passes up air entering the arch 5 through thesnnularportion of the air chamber.

Theair is then divided into the proper'quantitics of initial air which is suppl'e'd to the ash pits'of the furnaces and mg through the fuel bed produces the proper 'so that the furnace preferably has a producer actionand supplies-the hot gaseous roducts of partial combustion of the fuelt rough the throat arch Where the secondary air supplied through the ports 22, if desired, assists the complete combustion ofthe fuel in Qonnecplemental air entering the kiln shaft throng 1 the ports'26. Y Any desired means, such as suitable dampers, injectors or other draft devices may be volume and used to properly, control the temperature of the air supplied in these various ways. The iuitialainzfor example, may pass through the flue from the air chamber. and be forced into the ash-pit by a suitable injector 25v supplied by a'blast of air, steam origas at the desired? regulated presif desired, and having its inner. face. adjacent the stack relieved 0r inclined"v passages are preferably passa suitable grate to which in-the direction indicated to such extent as ning into the air chamber bebetween the bridge wall andthe combustion kiln temperature, may be had and where lime v the regulation of the air damper 33. In this Way the combustion of'the fuel on the grate 5 may be accurately regulated preferably so as to supply a large volume of heated products of partialfl combustion comprising carbonmonoxid andhydrocarbons to the kiln shaft. The su plemental air may be'supplied in the desire volumes by similar regulating devices, a suitable injector 23 being shown as located in the passage adjacent the port 22 so as to admit, if desired, regulated quantities of atmospheric air and force this, to-

ether with the heated air from the air cham bar below through the secondary parts 22, as shown in Fig. 2 Furthersupplies of supple mental airmay" be forced into the kiln shaft throughthe-portfidlocated still higher up by flues 36 which maybe provided with the injectors 43, if desired, the air being distributed by the passage 27 to the desired number of supplemental ports 26. In this way, a very perfect control of the combustion and is burns the flame is preferably regulated so as to produce a voluminous flame of moderate temperaturesubstantially filling the entire cross-section of the kiln shaft for a considerable "distance "above the heating zone adjacent the "separate furnaces and effecting the bug'ning of 'thelime in the desired uniform manner; X By the regulation of the temperature of the air supplied to the ash-pits and fuel beds thetem erature and com osition of the gases there d 'lated and the temperature of these gases can be, if desired, ill further modified by the as the injecting jet, although this is not necessary in most cases.

As indicated Fig. 2 the kiln shaft may be given a generallyoval section at its lower end 'adjacentlthe'furnaces and may flare outward in an upward direction so that, it is more mire throat.

described this invention in connection ian illustrative embodiment thereof, to the details of which disclosure the invention 'isjnot, of course, to be limited, what is claimed as'new and what is desired to, be tters Patent is set forth in the appended ,7 m U j c 1. In ritzicki'kilns, a kiln shaft provided with a goose neck' an'd suction pipe adj acent its upper-end 'to' carry oiffthe k1ln gases, a

municating'with'the; 'lnshaft, each of. said furnaces beingprovided with a grate, a com bustion arch having an tially similar means, the" air rising through the I y produced can e regu use of a {proportion of tempering gas such as steamwhich may, if'desired, be used lafr at the upper portion of the plurality ofseparate'f roduc'er furnaces coma'nd cooperating bridge wall. substantially; in line 'cwithsaid grate nd: having a relieved inner facei adjacent the stack to prevent the burned material entering the furnace throat, a cooler substantially in line with and receiving the burned material from the kiln shaft, said cooler having a corrugated metallic'discharge cone provided with a gate, a substaninclosed air chamber around. said cooler, said air chamber :to said ash-pits, separate supplemental fluesfrom said air chamber communicating with secondary ports in the kiln stack adjacent said furnaces and comflues conducting the heated air from municating with supplemental ports in the kiln stack above the level of said furnaces and blast devices in said fines to control the air-blast passing therethrough. 4

2. In stack kilns, a kiln shaft provided with a suction-pipe adjacent its upper end to can on the kiln "gases, a pluralityof separate producer furnaces communicating with the kiln shaft, each of said furnaces being provided with a grate, a combustion arch and a cooperating bridge wall having a re lieve'd inner face adjacent the stack, an inclosed "ash-pit below said grate having an ash-chute below the same and closed by an ash-pit door, a cooler substantially in line with and receiving the burned material from the kiln shaft, said cooler having a corrugated metallic discharge cone, a substantially i'nclosed air chamber around said cooler, fiues conducting the heated air from said air chamber to said ash-pits, separate vi ed with ports entering the kiln stack adjacent said furnaces, injectors in said flues to control the; air blast passing therethrough su plemental ,flues from said air chamber proand meanstoadmit external air to said flues.

3. In stack kilns,'a kiln shaft having a plurality'2 of communicating separate producer furnaces, each of 'said' furnaces being provided with a grate, a combustion arch -and a cooperating bridge Wall having a relieved inner face adjacent the stack, an inclosed ash-pit-belowv said grate, a cooler substantially in line with and receiving the burned material fromthe kiln shaft, a substantially inclosed air chamber around said cooler, flues .conducting the heated air from saidfair chfi llhclto said ash- I its, separate supplemental flues from sai air chamber communicating with ports entering the kiln stack vadjacent and above the furnaces and means 3 'ftpcontrolthe air blast passing through said ues.

In stack kilns, a kiln shaft having a plurality of communicating separate producer furnaces, each of said furnaces having a constricted throat, means to prevent the access of the'burned material to. said throat and an- I, inclosed ash-pit, a cooler below said furnaces to receive the .burned material from the kiln shaft, a substantially inclosed air chamber around sa d cooler, and means to force heated air from said air chamber teisaid ash- -20 nace and means to pits and to said kiln shaft adjacentand" above the. throats of saidfurnaces'in rogu lated quantities.

furnaces, each of said furnaceshaving a constricted throat, means to reventtheacc'ess of burned material to sai throat and an in-- closed ashit, a cooler constituting a continuation 0 said kiln shaft and substantiallychamber and ated tempera 1 inclosed to form an air-heati meansf'to supply air of re {aura-and,aprount from sai air chamber to said ash-pits and tothe kiln shaft adjacent or above the threats of said furnaces, 7

6. In stack kilns, akiln shaft having a separate furnace communicating-with said kiln shaft throu h a C(hlStl'iQtBd thlOdt, a substantially inc osedash-pit for said furburned material to said throat, a cooler having heat-diffusing walls extending below said kiln shaft and receivin the burned material therefrom, a'substantia 1y inclosed air chamher around said cooler and means to supply regulated quantities of heated air from. said.

cooler to said ash-pit and to the kiln shaft adj acent to or above the throat of ,said'furnace. 7, In stack kilns, a kiln shaft having a so separate furnace communicating with said shaft through a constricted throat, a substantially inclosed ash-pit for said furnace,

a substantially inclosed air chamber through which the burned material passes and means to supply heated air from said air chamber to said ash-pitand to the kiln shaft adjacent the throat of said furnace.

S. In stack kilns, a kiln separate furnace communicating with said 40 shaft through a constricted throat, a-cooler,

' substantially in.line with and receiving the bnrned material from said kiln shaft, a substantiall inclosed air chamber surrounding said cooler and means to supply heated air from 'said air chamber to the k1ln shaft a'djacent or above theithroat of said furnace; 9. In stackkilns, a kiln shaft having separate. heating means communicating -therewith, a cooler below said heating means and receiving the burned material from said kiln shaft, a substantially inclosed air chamber surroundin said cooler and means to supply heated air 'rom said air chamber to said kiln shaft adjacent or above said heating means.

10. In stack kilns, a kiln shaft. having sepaprevent the access of Shea having a ratehe a'tin'g means communicating t l1e're- I with, a substantially inclosed air. chamber Q v below saidheating means-through which'the I 5. In stack kilns, ajkiln shaft having aplu- 5 rality of communicating separated producer burned-material passes and-is thereby cooled and means for 'sn 1 heated from said 60. ra.

air chamber to. sax above said heat means. I 11. In stock akiln shafthavmga se arate heatingmfurnace communicating w th said shaft t ugha constricted throat,

means to. revent the access of burned material to sai throat, an inclosed ash pit for said s a imnt furnace, a cooler. below said furnace to receive the burned material from the kiln shaft, a substantially inclosed air chamber around said cooler and means to force heatedair in regulated quantities from said air chamber. to said kiln shaft adjacent the throat of said. furnace- 12.- In stack kilns, a kiln shaft a plurality of separate furnaces communicatmg therewith, a cooler below saidfurnaces to receive'theburned. material from-the kiln shaft, a substantially inclosed air' chamber around said cooler and means to force heated 80. air in reg'ulatdd quantities from said airchamher to said kiln shaftI adjacent orabove the throats of said furnaces. 1

13. Instack kilns, a kilnshaft havinga separate heating furnace communicat ng s5- therewith,. alsuction pipe communicat' with'saidshaft' adjacent its up r end an having itsdependi intake en located below the normal leve of material in said kiln shaft and means to supply heatedair to them) kiln shaft adjacent the mouth of said furnace.

' 14. In stack kilns, a-kiln shaft having a plurality of separate-heating furnaces communicating therewith, each of said furnaces I being provided with agrate, a combustion arch, a cooperating bridge'wall having arelieved inner face adjacent the stack" and an inclosed ash; pit below said grate, a cooler substantially in line with an receiving the burned material from the kilnshaft, a sub{ Wu. T. Kansas, I N Lrmor Eawam. 

